Systemic model for software cost analyzing and optimizing

Constructing low cost software is the main method to save energy source in computer science. Traditional research about software cost is only in one level. They are partial in some degree. To settle the problem, a systemic model for software cost analyzing and optimizing is proposed in this paper. In this systemic model, software cost analyzing and optimizing are from low level to high level. It can provide all-sided analyzing and optimizing in instruction, source code level and structure level. Some suggestions and methods are given in each level to enrich the model. The systemic model expresses a new point of view in software cost.